ed_receiver.m

一个UWB仿真程序包

%
% function [rx_down,samples_per_tint] = ed_receiver(rx_uoi,T_INT,FS_CONT,N_INT,MU)
%
function [rx_down,samples_per_tint] = ed_receiver(rx_uoi,T_INT,FS_CONT,N_INT,MU)

%square the shit
rx_sq = rx_uoi.^2;

%integrate pieces of T ns
samples_per_tint = T_INT * FS_CONT;
%pad the end with zeros so that we can do the reshape
rx_sq = zero_pad_reshape(rx_sq,samples_per_tint * N_INT);
%do the integration
% $$$ dt = 1/FS_CONT;
% $$$ rx_int = dt*sum(reshape(rx_sq, samples_per_tint, length(rx_sq) / ...
% $$$                         samples_per_tint),1);
rx_int = sum(reshape(rx_sq, samples_per_tint, length(rx_sq) / ...
                     samples_per_tint),1);


%do the quantization
if MU <= 0
  rx_quant = rx_int;
else
  rx_quant = [];
  idx_0 = find(rx_int<MU);
  idx_1 = find(rx_int>MU);
  idx_n = find(rx_int==MU);
  rx_quant(idx_0) = 0;
  rx_quant(idx_1) = 1;
  rx_quant(idx_n) = round(rand(1,length(idx_n)));
end
%sum N_INT blocks
rx_down = sum(reshape(rx_quant, N_INT, length(rx_quant) / N_INT),1);